Clinical Status and Bronchial Inflammation in Patients With Bronchiolitis Obliterans

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

40 participants

Study Classification

OBSERVATIONAL

Study Start Date

2011-05-31

Study Completion Date

2012-06-30

Brief Summary

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The aim of this case-control study is the characterization of the bronchial and systemic inflammation of children and young adults with bronchiolitis obliterans.

On the first visit subjects are asked to perform a lung function test (spirometry, body plethysmography with helium). Further levels of eNO and eCO are determined. A blood sample is drawn to describe the inflammatory status. Bronchial inflammation will be measured in induced sputum. At the second visit, a non-specific bronchial provocation testing (PD20 FEV1 methacholine) is performed.

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Detailed Description

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Objectives:

The aim of this study is the characterization of patients with bronchiolitis obliterans in terms of lung function, bronchial hyperreactivity and the degree of the systemic and bronchial inflammation.

Sputum and serum samples are analyzed by quantitative real-time polymerase chain reaction (PCR) (qRT-PCR) and by cytometric bead assay (CBA). Components of the innate immune system (mannose-binding protein, TLR recognition proteins and surfactant proteins) are genetically determined from sputum or blood respectively. In the conduct of this study the investigators will retrospectively and systematically evaluate the available high-resolution computed tomography (HRCT) studies of affected patients

Methods and Work Programme:

This study consists of two study visits (V1 and V2)

V1:

* Measurement of nitric oxide in expired air (eNO)
* Measurement of carbon monoxide in the exhaled air (eCO)
* Lung function testing with spirometry and body plethysmography
* Blood test: blood count, CRP, RAST, serum inflammatory mediators, genetic markers of the non-specific pulmonary defense system
* Induced sputum for inflammatory mediators and microbiological investigations

V2:

• Unspecific bronchial provocation test with methacholine (PD20 FEV1 methacholine)

Study population:

Children and young people (6 - 25 years of age). Both the patients and the healthy subjects are recruited from the outpatient clinic of Pediatric Allergy and Pulmonology.

Conditions

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Bronchiolitis Obliterans

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

CROSS_SECTIONAL

Study Groups

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affected patients

20 Patients suffering from bronchiolitis obliterans

No interventions assigned to this group

non-affected patients

20 matched controls not suffering from bronchiolitis obliterans

No interventions assigned to this group

Eligibility Criteria

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Inclusion Criteria

* informed consent
* between 6 and 25 years of age
* Known bronchiolitis obliterans / no bronchiolitis obliterans(depending on the study group)
* Ability to perform lung function tests and inhalation

Exclusion Criteria

* \<6 and \> 25 years of age on the day of written informed consent
* Acute illness with systemic or bronchial inflammation
* every chronic condition or infection (eg HIV, tuberculosis, malignancy)
* pregnancy
* known alcohol and/ or drug abuse
* Inability to understand the extent and scope of the study
* Participation in another study

Minimum Eligible Age

6 Years

Maximum Eligible Age

25 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes